<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script src="js/vue.js" type="text/javascript" charset="utf-8"></script>
	</head>
	<body>
		<div id="app">
			<p>{{total}}</p>
			<button-counter v-on:increment="incrementTotal"></button-counter>
			<button-counter v-on:increment="incrementTotal"></button-counter>
		</div>
	</body>
	<script type="text/javascript">
Vue.component('button-counter', {
  template: '<button v-on:click="increment">{{ counter }}</button>',
  data: function () {
    return {
      counter: 0
    }
  },
  methods: {
    increment: function () {
      this.counter += 1
      this.$emit('increment')
    }
  },
})
		
		new Vue({
			el:"#app",
			data:{
				total:0
			},
			methods:{
				incrementTotal:function(){
					this.total += 1
				}
			}
		})
	</script>
</html>
